import type { Article } from '@/types/nostr'

/**
 * Extract presentation data from article content
 * Supports multiple formats:
 * 1. Old format: "${presentation}\n\n---\n\nDescription du contenu :\n${contentDescription}"
 * 2. New format (content only): "Nouveau profil publié sur zapwall.fr\n<url>\n<photo>\nPrésentation personnelle : <presentation>\nDescription de votre contenu : <description>\nAdresse Bitcoin mainnet (pour le sponsoring) : <adresse>"
 * 3. New format (with JSON in tag): JSON metadata is stored in the 'json' tag, not in content
 *
 * Note: For new notes, the JSON metadata is stored in the 'json' tag.
 * This function extracts from content for backward compatibility only.
 * The main extraction should use extractTagsFromEvent to get json from tags.
 */
export function extractPresentationData(presentation: Article): {
  presentation: string
  contentDescription: string
} {
  const {content} = presentation

  // Try new format first
  const newFormatMatch = content.match(/Présentation personnelle : (.+?)(?:\nDescription de votre contenu :|$)/s)
  const descriptionMatch = content.match(/Description de votre contenu : (.+?)(?:\nAdresse Bitcoin mainnet|$)/s)

  if (newFormatMatch && descriptionMatch && newFormatMatch[1] && descriptionMatch[1]) {
    return {
      presentation: newFormatMatch[1].trim(),
      contentDescription: descriptionMatch[1].trim(),
    }
  }

  // Note: JSON metadata is now stored in tags, not in content
  // This function extracts from content for backward compatibility only
  // The main extraction should use extractTagsFromEvent to get json from tags

  // Fallback to old format
  const separator = '\n\n---\n\nDescription du contenu :\n'
  const separatorIndex = content.indexOf(separator)

  if (separatorIndex === -1) {
    // Fallback: return content as presentation if separator not found
    return {
      presentation: content,
      contentDescription: '',
    }
  }

  const presentationText = content.substring(0, separatorIndex)
  const contentDescription = content.substring(separatorIndex + separator.length)

  return {
    presentation: presentationText,
    contentDescription,
  }
}